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Heat-resisting modified wire enamel and preparation method thereof

An enameled wire varnish, heat-resistant modification technology, applied in the field of heat-resistant varnish, can solve the problems of unguaranteed performance of enameled wire, limited environmental protection effect, difficult control of coated wire surface, etc., achieves low viscosity, excellent reworkability, Effect of improving heat resistance and electrical properties

Inactive Publication Date: 2017-09-19
HEFEI MINGYOU HIGH TEMPERATURE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid content is greatly increased to more than 60%, the viscosity reaches more than 6000mPa·s, the surface of the coated wire is not easy to control, and the performance of the enameled wire cannot be guaranteed. At the same time, the solvent still contains a large amount of phenolic and aromatic solvents containing benzene rings, and the environmental protection effect is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A heat-resistant modified enameled wire varnish, comprising the following raw materials: 100kg of polymethylphenyl silicone resin, 32kg of phenolic resin, 8kg of tetrabasic zinc chromate, 5kg of diethanolamine, 6kg of toluene diisocyanate, heat stabilizer two Salt base lead phosphite 4kg, drier manganese dioxide 5kg, 703 curing agent 7kg, colorant carbon black 5kg, acetonitrile 15kg, alcohol solvent 50kg. Among them, the polymethylphenyl silicone resin has a weight loss rate of less than 15% and a dielectric strength of 15-40Kv / mm at a temperature of 400-600°C.

[0024] The preparation method of the above-mentioned heat-resistant modified enameled wire varnish comprises the following steps:

[0025] (1) Weigh polymethylphenyl silicone resin, diethanolamine, toluene diisocyanate, acetonitrile, and alcohol solvents according to weight, mix and stir evenly, heat up to 136°C, stir for 45 minutes, and sonicate for 12 minutes to obtain a homogeneous solution.

[0026] (2) We...

Embodiment 2

[0029] A heat-resistant modified enameled wire varnish, comprising the following raw materials: polymethylphenyl silicone resin 87kg, phenolic resin 38kg, tetrabasic zinc chromate 6kg, diethanolamine 5kg, toluene diisocyanate 6kg, heat stabilizer hard Calcium fatty acid 4kg, drier lead naphthenate 5kg, 793 curing agent 10kg, colorant lead yellow 5kg, acetonitrile 14kg, alcohol solvent 48kg. Among them, the polymethylphenyl silicone resin has a weight loss rate of less than 15% and a dielectric strength of 15-40Kv / mm at a temperature of 400-600°C.

[0030] The preparation method of the above-mentioned heat-resistant modified enameled wire varnish comprises the following steps:

[0031] (1) Weigh polymethylphenyl silicone resin, diethanolamine, toluene diisocyanate, acetonitrile, and alcohol solvents by weight, mix and stir evenly, heat up to 136°C, stir for 45 minutes, and sonicate for 15 minutes to obtain a homogeneous solution.

[0032] (2) Weigh the phenolic resin, place it...

Embodiment 3

[0035] A heat-resistant modified wire enamel, including the following raw materials: 102kg of polymethylphenyl silicone resin, 24kg of phenolic resin, 5kg of tetrabasic zinc chromate, 7kg of diethanolamine, 5kg of toluene diisocyanate, heat stabilizer three Basic lead sulfate 8kg, drier manganese naphthenate 6kg, curing agent 2-ethyl-4-methylimidazole 10kg, colorant chrome green 4kg, acetonitrile 15kg, alcohol solvent 56kg. Among them, the polymethylphenyl silicone resin has a weight loss rate of less than 15% and a dielectric strength of 15-40Kv / mm at a temperature of 400-600°C.

[0036] The preparation method of the above-mentioned heat-resistant modified enameled wire varnish comprises the following steps:

[0037] (1) Weigh polymethylphenyl silicone resin, diethanolamine, toluene diisocyanate, acetonitrile, and alcohol solvents by weight, mix and stir evenly, heat up to 140°C, stir for 40 minutes, and sonicate for 20 minutes to obtain a homogeneous solution.

[0038] (2) ...

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Abstract

The invention discloses heat-resisting modified wire enamel and a preparation method thereof. The wire enamel comprises the following raw materials in parts by weight: 80-120 parts of poly-methyl phenyl organic silicon resin, 20-40 parts of phenolic resin, 5-15 parts of tetrabasic zinc chromate, 3-8 parts of diethanol amine, 5-10 parts of toluene diisocynate, 2-10 parts of a thermal stabilizer, 3-8 parts of a dryer, 5-12 parts of a curing agent, 3-6 parts of a colorant, 10-20 parts of acetonitrile and 40-60 parts of alcohol solvents. The preparation method comprises the steps of modifying, mixing, reacting and curing. The wire enamel disclosed by the invention is heat-resisting and anti-flaming, has the characteristics of high solid content and low viscosity, and is capable of reducing the dosage of the solvents and reducing the pollution. According to the preparation method, the energy consumption is saved and the cost is lowered.

Description

technical field [0001] The invention relates to the technical field of heat-resistant varnish, in particular to a heat-resistant modified wire enamel and a preparation method thereof. Background technique [0002] In the prior art, the mass percentage content of solids in wire enamel products is generally only about 30-40%, and the solvent content is 70-60%. Solvents use a large amount of phenolic solvents. The personnel's body has been injured, and the environment has been caused considerable pollution, and the products containing benzene rings are not easy to decompose, which has a great impact on the environment. [0003] In recent years, both at home and abroad have begun to change from the perspective of paint solvents, that is, to increase the solid content to reduce solvent consumption and exhaust emissions to achieve the purpose of protecting the environment. The solid content is greatly increased to more than 60%, the viscosity reaches more than 6000mPa·s, the surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D161/06C09D5/18C09D7/12C09D7/00
CPCC09D183/04C08L2201/02C08L2201/08C08L2203/202C09D5/18H01B3/308C08L61/06C08K13/02C08K3/24C08K5/17C08K5/29
Inventor 王虎
Owner HEFEI MINGYOU HIGH TEMPERATURE TECH CO LTD
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